[quote ascuns]Like raven said you need to activate it in the pet bar or pet spell book you can either set it to automatically or you can trigger it manually its your preference but once you do it works fine.
Reject ...

If your talking about the passive ability that frost artifact brings its an passive ability you don't use it automatically it works itself over combat you gain replicas of your artifact that you see floating around they automatically pierce the enemy during co ...

Confirmed it does break stealth.
Also the other 2 auras break stealth as well.
http://www.wowhead.com/spell=199719/heartstop-aura also breaks stealth and so does http://www.wowhead.com/spell=199642/necrotic-aura which should not happen.

This isn't proof 1st of all this is BFA not legion 7.1.5 so this proves nothing second i mean proof that it happens in game on freakz servers.
Il do my own testing a researching but next time submit proper proof or it maybe rejected.

Hello! For any bug report you make please make sure you post a bug WITH PROOF. You need to show proof that this happens to you and you also need to show how it should work in this patch on retail. I will not confirm or reject this post until you reply with som ...

It is supposed to be like that read it again https://www.wow-freakz.com/spells.php?spell=207346&&name=necrosis when u "deal damage" not when you cast it so its got to hit the target and deal the damage first before applying.
Rejected.